Nurling-tool holder.



PATENTED AUG. 30, 1904.

A. H. RIEGNER. KNURLING TOOL HOLDER.

APPLICATION FILED AUG. 17, 1903.

N0 MODEL.

X amoewtoz new,

Wi/Cmcooeo Patented. August 30, 1901.

llNiTED STATES PATENT QEEicE.

AUSTIN H. RIEGNER, OF READING, PENNSYLVANIA.

NURLING-TOOL HOLDER.

SPECIFICATION forming part of Letters Patent No. 768,771, dated. August30, 1904;,

Application filed. Angnst l'7, 1903.

To all whom it may concern:

Be it known that'I, AUSTIN H. RIEGNER, a citizen of the United States,residing at Reading, in the county of Berks and State of Pennsylvania,have invented certain new and useful Improvements in Nurling-ToolHolders; and 1 do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to improvements in nurling-tool holders; and theobject of the same is to provide a device for nurling the outer surfaceof cylindrical bodies which is simple in construction and efiective inoperation, and to this end my invention consists in the details ofconstruction and arrangement of the several parts, as hereinafter morefully set forth in the accompanying specification and illustrated in thedrawings, in which Figure 1 is a longitudinal sectional view on the line(B m of Fig. 2. Fig. 2 is a front view. Fig. 3 is a plan view of mydevice, and Fig. 4C is a detail view of a portion of the headpiece andadjusting-screw.

Referring more particularly to the drawings, the numeral 1 designates ahollow shaft which is formed with a head-piece 2. This head-piece isprovided with two diametrically opposite open slots 3. One of the wallsor faces of each of the slots is provided with a smooth semicircularopening or recess 3, which communicates with the said slots 3. Theseopenings are so constructed as to form a shoulder 3 at the upper portionthereof.

The numeral 4 designates tool carriers, which are provided with reducedrear ends or shanks 5 and tapered forward ends or jaws 6. These reducedends or shanks 5 rest and are adapted to move in the slots 3 by means ofthe screws 7 in the following manner: Each of the shanks 5 is providedwith a semicircular opening or recess 5, which is so located that itstands directly opposite the opening or recess 3 in the head member whenthe said shank is in position, and said recess or opening is providedwith screw-threads. To

assemble these parts, the screw 7 is first placed in position in therecess 3 on each side of the Serial No. 169,708. (No model.)

head, so that the shoulder 3 projects over a portion of its upper end,which will allow a portion of the body thereof to project beyond theface of the wall and into the slot 3. The shank of the tool-carrier isthen placed in the slot, so that the threads in the opening 5 areengaged by the screw 7 and said screw is then turned, which will causethe jaw 6 to be forced downward. After it is once in position said jawmaybe adjusted at will by simply turning the screw 7. It will be seenthat with this construction it is impossible for the parts to drop outof position, as the screw 7 is held in place by the shoulder 3 and thejaw 6 by means of the threads in the opening 5 being engaged by thethreads on the said screw.

A supplemental regulating-screw 8 is mounted in each of the shanks 5,near the rear end thereof, and passes entirely through the same toengage the head-piece 2 for the purpose of taking up the throw of thejaws when they are set to take a given diameter, bringing their innerfaces on parallel lines and keeping the carriers in rigid position inthe holder.

It will be noted that the reduced ends or shanks 5 of the tool-carriers4 form shoulders 4, which engage the end of the head-piece 2 and serveas a means for relieving the strain exerted by the endwise pressure ofthe jaws 6 upon the adjusting-screws 7.

In the ends of the jaws 6 are secured revolving hurling-tools 9. Thesetools are of ordinary construction and are revolubly mounted in openings10 by means of screw-pins 11 entering the front ends of the jaws andpassing through said tools.

It will also be noted that with my device the tools are always held inperfect alinement and bear upon directly opposite points of the body tobe operated upon, thereby tending to prevent bending or bearing awayfrom the tool.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. A device of the class described, comprising a hollow shaft,ahead-piece secured to said shaft and being provided with diametricallyoppositeopen slots, tool-carriers, each of said carriers being providedwith a reduced rear of the reduced ends and the head-piece, and asupplemental regulating screW carried by each end, an d adapted toengage the head-piece, a shoulder formed on each of the carriers by thereduced end, said shoulders engaging the end of the shaft, and arotating tool mounted in each of the carriers.

In testimony whereof I affix my signature in presence of two Witnesses.

AUSTIN H. RIEGNER. Vitnesses:

E1). A. KELLY, Gno. M. MILLER.

